The GNU Image Manipulation Program is a free editor that retouches and enhances images. GIMP 2.6 provides a "Color Picker Tool" that samples a small section of your image file. This color sample ...
Whenever you open the GIMP app, it will open without the canvas. The canvas is a visible area of the image, and by default, the canvas corresponds with the size of the layers; you can enter text or ...
Photoshop, GIMP, etc. should be on the top of your list when it comes to a professional image editing tool to do certain changes including brightness/contrast adjustment, special effects and more.